Shark IZ440 Series Troubleshooting

If you are having problems with your Shark IZ440 Series Vacuum Cleaner, you are not alone. Many Shark IZ440 Series owners experience issues with their vacuum cleaner from time to time, and it can be frustrating to deal with these problems.

I have problems with my Shark IZ440 Series

Reported Shark IZ440 Series Issues

What issue are you encountering?


  • My vacuum has no or low suction
    • Verify if the suction was low from first use or over time.
  • The brush roll is not spinning
    • Turn on the unit
  • My vacuum will not turn or charge
    • Turn the unit off. Plug the unit into the charger and plug the charger into the wall outlet.
    • Note:
      1. Agent, please record a light response
      2. Unplug/Re-plug the unit, as the light turns off 5 min after reaching full charge. The LEDs will re-light for 20 sec if the charger is unplugged/plugged in or if the unit is turned on.
      3. The unit will not power on when plugged in

  • What LEDs are lighting up on the unit?
    • Normal Charging Lights

        • Normal Charging Lights
        • If only the light closest to the handle (Low Charge) is blinking slowly, that means the unit may have run out of battery in use.
        • The unit needs to be charged. Charging can take up to 3.5 hours
    • LED 2 and 3 (Bottom two) are flashing
      • This error means that the charger is the wrong voltage. Please be sure that you are using the SHARK charger that came with your unit. Other chargers may fit into the unit, but these could be the wrong voltage.
      • If you own other SHARK cordless products, the chargers may look similar but the voltages can be different.
    • LED 1 and 3 (outer two) are flashing LED 2 is off
      • The battery has a temperature error (either too cold or too warm), and cannot charge until the temperature returns to normal.
      • Leave the battery plugged in and it will start charging when the temperature moves into the appropriate range.
    • 3 Solid Lights
      • This indicates that the battery is fully charged. Unplug the unit and turn the power switch to ON
    • No Lights
      • Plug the charger into a verified working outlet in another room.
      • Unplug the unit from the charger. Turn the unit on.
  • My unit is making an unusual noise
    • Remove the handheld vacuum from the wand and turn it on
  • There is a burning smell
    • If the smell is an out-of-the-box unit, This may be a new motor smell for the first couple of uses.
    • Turn off the vacuum.
    • Disassemble the unit. Remove the handheld vacuum from the wand, and the wand from the floor nozzle.
    • Inspect the connection points on the handheld, both ends of the wand, and the nozzle for debris, damage, or burns. Remove any dust or debris.
    • Smell the nozzle, handheld vacuum, and wand separately to ascertain where the smell is coming from and if there are no visible burns
    • Turn the nozzle upside down. Use a coin to turn the locks on the bottom cover counterclockwise to open the bottom cover in order to access the brush roll.
    • Check for a jam or a clog around the brush roll. Inspect the brush roll and ends of the brush roll for damage or melting.
    • Check for debris or clogs inside the nozzle openings.
    • Once all clogs have been cleared, reattach the bottom cover, pressing down firmly on all sides. Use a coin to turn the locks clockwise.
    • Empty the dust cup.
    • Holding it over a trash receptacle, press the slider button on the left side of the dust cup. The bottom of the dust cup will open to let dust and debris fall into the trash.
    • While leaving the door open, reach inside the dust cup to ensure that no dust or pet hair is blocking the airflow through the cone-shaped screen in the center of the dust cup.
    • Close the dust cup lid.
    • Remove the pre-motor filters from behind the dust cup and set aside. If you have not washed your filters in a while, they may need to be cleaned.
    • Reattach the dust cup without the filters.
    • Turn just the handvac portion of the vacuum on by itself and check for a burning smell
  • The soft roller is not spinning
    • Ensure the unit is plugged in and turned onto the Carpet setting.
    • Tilt the handle back to engage the brush roll. Check the indicator light.
      • What color is the Brushroll Indicator light?
        • Green
          • Check to see if the main brush roll is spinning.
        • Solid/Flashing red
          • Turn off the unit. Detach the floor nozzle from the main unit.
          • Turn the nozzle upside down. Use a coin to turn the locks on the bottom cover counterclockwise to open the bottom cover in order to access the brush roll.
          • Check for a jam or a clog around the brush roll.
          • Check for debris or clogs inside the nozzle inlets/openings. Remove any debris
          • Once all clogs have been cleared, reattach the bottom cover, pressing down firmly on all sides. Use a coin to turn the locks clockwise.
          • Now reconnect the nozzle to the main unit, ensuring you hear a click. Turn it on.
          • Use the slider to place the vacuum in the appropriate setting and run the vacuum back and forth across the floor.
        • No light
          • Turn off the vacuum. Debris can get into the unit connectors and prevent the nozzle from getting power.
          • Detach the handvac from the wand using the handvac release button. Using a flashlight check for any debris that may be lodged in the handvac connection (3 holes).
          • Detach the wand from the floor nozzle and check for debris, dust, lint, etc. in the nozzle and wand connectors. Use a flashlight to look into the 3 holes in the bottom of the wand. (3 holes/prongs in the nozzle and wand)
          • Reassemble the entire unit, ensuring each part clicks into place. Turn the unit on. Place your foot in the nozzle and tilt the handle back.
  • Static Shock
    • Static is a common phenomenon that occurs when the humidity is low (especially during winter). It is similar to what one might experience when rubbing socks on a carpet, pulling a wool sweater over the head, or brushing hair.
    • The vacuum is equipped with an ESD (electrostatic discharge) management system that consists of a plate in the handle and a grounding connection in the wand.
    • The connection between the wand and handvac may need to be cleaned.
    • Advise the customer to disconnect the wand from the handvac. Inspect the thin wire located along the side of the wand connection and extending to the inside of the wand. Clean the wire with a dry cloth.
    • Inspect the connection pad inside the handvac and likewise clean it with a dry cloth.
    • Reassemble the handvac and wand.
    • Locate the ESD plate on the inside of the handle.
    • Advise the customer that their hand needs to be in contact with the plate at all times for the system to function.
    • Advise customer that a humidifier may reduce the occurrence of static shocks

Shark IZ440 Series Vacuum Cleaner Problems

Below are common issues and solutions for the Shark IZ440 Series:

The Shark IZ440 Series is not picking up debris. No suction or light suction. The nozzle light is red.


  • Check filters to see if they need cleaning. Follow instructions for rinsing and completely air-drying the
    filters before reinserting in the vacuum.
  • Dust cup may be full; empty dust cup.
  • Check floor nozzle for blockages; clear blockages if required.
  • Remove any string, carpet fibers, or hair that may be wrapped around the brush rolls.
  • Check the connection between the handheld vacuum and wand for blockages; clear blockages if required. If the issue persists, please contact Customer Service.
  • Check clog access in the wand for any blockages and clear any debris

The Shark IZ440 Series lifts area rugs. The Shark IZ440 Series is not turning on. The nozzle light is blinking red.


  • Make sure you are not engaging in Boost mode. Take care when vacuuming area rugs or rugs with delicately sewn edges. The vacuum has overheated and turned off to cool down. Remove all blockages and wait 60 min to allow the motor to cool down.
  • Turn off the unit to disengage the brush rolls and restart with the power/selector switch

The Shark IZ440 Series brush rolls do not spin


  • Immediately turn off the vacuum. Remove any blockages before turning the vacuum back on. Make sure the handheld vacuum is tilted back far enough for the brushrolls to engage. If the brushrolls still do not spin, please contact Customer Service.
  • If the floor nozzle has headlights and they are not illuminated, there is a connection issue between the handheld vacuum, wand, and nozzle. Try disconnecting and reattaching the pieces. If the headlights still do not illuminate, please contact Customer Service.

The Shark IZ440 Series turns off on its own


  • There are several possible reasons for the vacuum turning off on its own, including blockages, battery
    issues, and overheating. If the vacuum turns off on its own, perform the following steps:

    1. Turn on the vacuum and check the battery indicator lights located on the handheld vacuum. If recharging is needed, make sure the power/selector switch on the vacuum is set to the Off position before connecting the charger.
    2. Empty the dust cup and clean the filters (See Emptying the Dust Cup and Cleaning the Filters sections).
    3. Check wand, accessories, and inlet openings and remove any blockages.
    4. Allow unit and battery to cool for at least 45 minutes, until they return to room temperature.
    5. Restart with the power/selector switch

The Shark IZ440 Series battery Indicator Lights on the handheld vacuum are flashing


  • The bottom LED light is flashing (Fig. A): The battery needs to be charged.
  • Top and bottom LED lights are flashing (Fig. B): Battery temperature is not optimal, so charging is temporarily paused. Leave the battery plugged in and charging will resume soon.
  • If top 2 or bottom 2 LED lights are flashing (Fig. C, Fig. D), call Customer Service at 1-800-798-7398.

Shark IZ440 Series Replacement Parts

How to Diagnose and Repair a Shark IZ440 Series

This guide will help you identify and resolve issues with your Shark IZ440 Series Vacuum Cleaner.

Shark IZ440 Series Issues? Need Help?

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